Do you know where idme writes to, and what it actually does? Google has yielded no useful results. Most of what i can find are the idme bootmode commands, which explain nothing.
EDIT: Found it. /proc/idme/<flag>. Even with root, it is read-only
Sent from my Amazon Fire using XDA Labs
This is the most informative post I had seen so far.
In addition to the same /proc/idme reference you mention, it also shows where idme writes (on that device; the offsets may vary,
but you could probably get the source code from Amazon and check for your particular device), and outlines the procedure for
passing variables from idme to the bootloader.